Merge pull request #43 from BluntBlade/master

合并其他人的提交内容。
Add CORS document
Merge pull request #44 from ikbear/add-cors-document

Add CORS document
added jar links
Merge pull request #45 from icattlecoder/fix/added_jar_links

added jar links
Merge branch 'master' of github.com:qiniu/developer.qiniu.com